<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width" />
    <title>菜鸟教程</title>
  </head>
  <body>
    <script type="text/javascript">
      var a = "abcde";
      var b = "哈哈哈哈";
      var c = "123456";
      var d = "海奥华预言";
      var e = "";
      // var f=haha;

      console.log(typeof a);
      console.log(typeof b);
      console.log(typeof c);
      console.log(typeof d);
      console.log(typeof e);

      var str1 = '我说："今天\t"天气真不错';
      var str2 = "\\\\\\";
      console.log(str1);
      console.log(str2);

      var str11 = "你好啊";
      var str22 = "学习永不止步！";
      var str33 = "nihaoa";
      var str44 = "xuexiyongbuzhibu";
      console.log(str11.length);
      console.log(str22.length);
      console.log(str33.length);
      console.log(str44.length);

      var dd = true;
      console.log(typeof dd);
    </script>
  </body>
</html>
